开云体育

The messages? That's an interesting idea. You can of course look in your group's Members page for a list of the addresses (members) that have met the criteria for the Bouncing (blue B) or Bounced (red B) status.

I'm not entirely certain how one would go about this. I think you'd have to visit each member's subscription page and collect the list of Recent Bounces. Totaling the number of entries in those lists will give you some kind of measure, but it is uncertain due to the word "Recent".

You might want to try and correlate which messages bounced when sent to which members; but I suspect that would turn out to be random.

No.

Email services reject message delivery for many different reasons. Some of the reasons are more or less permanent (that email address has been closed), others are explicitly transient (I'm too busy right now, try again later). The explicitly transient ones Groups.io handles automatically by retrying the delivery of that message to that member later. But eventually Groups.io will give up on those retries, and then it becomes recorded as a "bounce".

Shal